Electrically-heated presser foot



H. E. RUDOLPH.

ELECTRICALLY HEATED PRESSER FOOT.

APPLICATION FILED JUNE 28, 192i.

Patented Feb. 14, 1922.

HETT/E E IFUDOLPH By W 11 TTOH/VEYS vlllllllllllz WITNESSES and State ofArizona, have invented a new UNITED STATES- BETTIE E. RUDOLPH,

OF BISBEE, ARIZONA.

ELECTRICALLY-HEATED PRESSER FOOT.

To all whom it may con 061%:

Be it known that I, Hn'rrm E. RUDOLPH, a citizen of the United States,and a resident of Bisbec, Lowell, in the county of Cochise and ImprovedElectrically-Heated Presser Foot, of which the following is a full,clear,

and exact description.

This invention relates to improvements in an electrically heated presserfoot, an object of the invention being to provide on the presser foot ofa sewing machine an electric heater so that the presser foot serves inaddition to its ordinary function, the function of an iron to pressseams, hems, pleats, tucks, etc, as they are stitched on the machine.

A further object is to provide an electric heater constructed as anattachment to fit the upper surface of a presser foot and function toheat the presser foot so that the latter functions as an iron during theoperation of the machine.

WVith these and other objects in view the invention consists in certainnovel features of construction, and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings- Figure 1 is a view inelevationillustrating the head of a sewing machine and showing my improved heaterin position on the presser foot thereof.

Figure 2 is an enlarged view in longitudinal section through the presserfoot showing' my improved heater thereon.

fligure 3 1s a sectional plan view on the line 3-3 of Figure 2. i t

Figure 4c is a view in transverse section on the line 4-4 of Figure 2.

1 represents the head of anordinary sewing machine and 2 the presserfoot which is preferably elongated so as to provide an jfextendedsurface for the passage of material under the same. .This presser foot 2,has a -=tubular shank 3 secured by a set screw 4 to the presser bar 5vof the machine'andl the presser foot is made with. an opening 6 for thepassage of the needle 7 of the machine.

Specification of Letters Patent. Patented F bi .14 1922 Applicationfiled June 28,

1921. Serial No; 481,013.

The outer free end of the presser foot 2 is curved upwardly, as shown at8, to provide a ready entrance for the .material under the same.

On the upper face of the presser foot 2 I locate the casing 9 of myimproved electric heater 10. This casing 9 is preferably of metal havinga lining 9 of insulation and secured to the presser foot by means ofscrews 11, said screws projected through the caslng and the lining andscrewed into threaded openings 11' in the. presser foot.

The forward end of the casing 9 conforms to the upwardly curved shape ofthe end of the presser foot 2 and inside of the casing the electricheater or coil 10 is located having its terminals secured to bindingposts 12 electrically connected by wires 13 with any source ofelectricity.

The coil 10 preferably comprises two runs of a coiled wire separated bya longitudinal partition 14' of insulation, the latter having an opening15, through'which the intermediate portion of the coil projects.

The operation of the device is as follows: When the heating coil 10 isin electric circuit with its source of supply, the heat generated in thecoil will be imparted, to the presser foot 2 and the said presser footwhen in engagement with the goods, will serve as an iron to press downthe seam, hem, or other portion of the material on which the machine isoperated.

To prevent possibility of'short circuiti'ng I preferably provide arelatively thin sheet 7 of mica 16 under the coil 10.

-It is obvious that various changes might be made in the form of heaterand the manner of connecting the same to the presser foot and in theother details of construction without departing from my invention, -andhence I do not limit myself to the precise details setforth, butconsider myself at lib- .bination presser foot and iron.

2. As a new article of manufacture, a

.presser foot, and means carried thereby for heating the same.

3. The combination with a and an electric heater thereon.

4:. The combination with a relatively long presser foot, of a heatercasing secured on the presser foot, and an electric heating coil in thecasing.

' 5. The combination with arelatively long presser foot,

' pres ser foot, of a heatercasing secured on the presser foot, anelectric heating coil in HETTIE E. RUDOLPH.

